1887

Abstract

Summary

Exploration and prospect identification in complex geology requires seismic data with long offsets and wide signal bandwidth in combination with high-resolution model building and imaging methods. Full waveform inversion (FWI) is being used in model building flows for improving the resolution of the near surface velocity with a potential impact on the imaging of deeper structures. This type of inversion makes use mostly of first arrivals from the longest offsets. Signal from smaller offsets and later times extend the depth range and resolution of FWI. In this work we invert first for first arrivals and then for reflections using a standard FWI method in combination with reconstructed wavefield method. We apply this flow to a deep water GOM dataset in an area characterized by relative shallow folding, sand channels and faulting. The resulting velocity model has a resolution good enough to identify these structural features, and furthermore the inverted velocity produces a good match with available well information.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201800684
2018-06-11
2024-03-29
Loading full text...

Full text loading...

References

  1. Kelly, S., Ramos-Martinez, J., Tsimelzon, B., and Crawly, S.
    [2010], Application of an impedance-based full waveform inversion method for dual-sensor, single-streamer field recordings, 72nd Conference and Exhibition, EAGE, Extended Abstracts.
    [Google Scholar]
  2. Liu, Y., Yang, J., Chi, B. and Dong, L.
    [2015], An improved scattering-integral approach for frequency- domain full waveform inversion. Geophysical Journal International, 202(3), 1827–1842.
    [Google Scholar]
  3. Peng, C., Wang, M., Chazalnoel, N., and Gomes, A.
    , [2018], Subsalt improvement possibilities through a combination of FWI and reflection FWI, TLE, 52–57.
    [Google Scholar]
  4. Routh, P., Neelamani, R., Lu, R., Lazaratos, S., Braaksma, H., Hughes, S., Saltzer, R., Stewart, J., Naidu, K., Averill, H., Gottumukkula, V., Homonko, P., Reilly, J., and Leslie, D.
    [2017] Impact of high-resolution FWI in the Western Black Sea: revealing overburden and reservoir complexity, TLE, 60–66.
    [Google Scholar]
  5. Sirgue, L., and R.Pratt
    [2004], Efficient waveform inversion and imaging: A strategy for selecting temporal frequencies. Geophysics, 69, 231–248
    [Google Scholar]
  6. Tarantola, A.
    [1984] Inversion of seismic reflection data in the acoustic approximation. Geophysics, 49, 1259–1266.
    [Google Scholar]
  7. Van Leeuwen, T., and Hermann, F.
    , [2013], Mitigating local minima in full-waveform inversion by expanding the search space. Geophysical Journal International, 195, 661–667
    [Google Scholar]
  8. VighD., Jiao, K., Cheng, X., Sun, D., and Lewis, W.
    [2016] Earth-model building from shallow to deep with full-waveform inversion, TLE, 1025–1030.
    [Google Scholar]
  9. Wang, C.W., Yingst, D., Farmer, P., Jones, I., Martin, G., and Leveille, J.
    , [2017], Reconstructed waveform inversion with the extended source, SEG International Exposition and 87th Annual Meeting, 1450–1452.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201800684
Loading
/content/papers/10.3997/2214-4609.201800684
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error